Ellipsograph.



C. I. BERG.

ELLIPSOGRAPH.

APPLIGATION FILED JULY 24, 1913.

1,1 16,549. Patented Nov. 10, 1914.

[HF NORRIS PETERS CO PHOTO-LITHOZ. WASHINGTON, r1 0.

unrrin) sTA'rEs rA'irEN T ormcn CHARLES I. BERG, OF NEW YORK, N. Y.

ELLIPSOG-RAPH.

To all whom it may concern Be it known that 1, CHARLES I. BERG, a citizen of the United States, residing in the city of New York, borough of Manhattan, in the county of New York and State of New York, have invented certain new and useful lnnn'ovements in Ellipsographs, of which the following is a specification.

My invention relates to new and useful improvements in ellipsographs or instruments for use in the drawing of ellipses, and the object of the invention is to provide a device of the character stated which will be extremely simple in construction, cilicient in operation and which may be readily adjusted for the drawing of ellipses of varylng sizes.

The invention consists in the improvements to be more fully described hereinafter and the novelty of which will be particularly pointed out and distinctly claimed.

I have fully and clearly illustrated my invention in the accompanying drawings to'be taken as a part of this specification and wherein:

Figure 1 is a view of one embodiment of my invention. Fig. 2 is a plan view of the device showing the mode of operation employed in drawing an ellipse. Fig. 3 is a longitudinal sectional view through a clutch member and anchoring device e1n ployed in the embodiment of the invention shown in Figs. 1 and 2. Fig. 4 is a view partly in section of another embodiment of the same invention.

Referring to the drawings by characters of reference 1 designates a flexible member, preferably consisting of a piece of cord of suitable length and strength and of such construction as to be as nearly as possible inelastic, and incapable of being stretched. A good quality of braided fish-line will serve the purpose, especially in view of the fact that the surface thereof is substantially without twist or corrugation. Mounted on, and carried by, the member 1 are anchor de vices preferably two in number, as at 2, 3, one or both of which may include clutch means, as will be presently set forth, which will permit variation as desired of the length of said member 1 between said devices.

As shown in Figs. 1, 2 and 3, both anchor devicesmay include said clutch means, and in describing said figures I will describe but one of said devices specifically as the Specification of Letters Patent.

Application filed July 24, 1913.

Patented Nov. 10, 1914. Serial No. 780,854.

description of one applies tothe other. The anchor devices as shown in said Flgs.

1 and 2 each may consist, although not 1;, and provided with a hand-knob 1O adapt ed to be grasped by the operator to pull the plunger 7 out of the tapered chamber 6 into the cylindrical bore or chamber 5 of the sleeve. The plunger head 7 is provided with a pocket 11. extending therethrough, and opening against the tapered wall of the chamber 6 and also into the bore of thehead 7. Seated in the pocket 11 is a locking ball 12, adapted to roll against the tapered surface 6, said plunger 7 being moved into the tapered portion 6 by an expansive coiled spring 13 arranged around the part 9 and having one end abutting the plunger 7, whilethe opposite end engages a washer-1 1 at the rear end of the sleeve 1, and held in place therein by a flange 15 on said sleeve.

sleeve whereby said tapered portion moves the ball 12 inward until it projects through its seat 11. into the bore of the head and frictionally engages and holds the flexible member 1, which extends through said bore. It will be understood that, when the flcxible member is pulled toward the handle 10, the frictional engagement between the cord and the ball will be sufficient to move the plunger 7 back far enough to relieve the frictional engagement of the ball with. the member, but when the said member -1 is pulled in the opposite direction the spring 18 will be free to force the plunger 7 and ball into the tapered portion of the sleeve so that the ball frictionally engages and holds the flexible member.

Each anchor device is provided on its under face with a piercing point or tack 16 adapted to be forced into the paper and drawing-board in the manner of a thumb tack, and to prevent rotation of the anchor device on said point 16, as a pivot, I preferably provide a small holding point or tack 17, also adapted to pierce the paper and the the actionQ of the spring 13 the plunger 7 is moved into the tapered seat 6 of the interior of the drawing-board. I preferably knot the flexible member 1 as shown at 18, or provide it with some other suitable device to prevent passage of said member through the anchor device 3. I arrange the anchor devices 2, 3 on the flexible member in the reverse direction from each other so that the anchor device 2 operates to hold the cord 1 against movement in one direction, while the other anchor device 3 prevents movement of the cord in the opposite direction.

The device above described is employed for drawing an ellipse in the following manner: A line is drawn as shown at X to coincide with the major axis of the ellipse from which line is erected a line y to coincide with the minor axis of the ellipse, and points are marked off on the said lines corresponding to the length of the major axis and the minor axis of the ellipse it is desired to draw, it being understood that the line coinciding with the minor axis bisects the line coinciding .with the major axis. lVith a compass or other suitable instrument, and taking the point on the line y indicating the end of the minor axis, as a center, the major axis is cut at the points a, b, at a radius equal in length to one-half of the major axis. The anchor device 2 and anchor device 3 are then fixed in position by means of their piercing points so that the outer tapered ends of said devices will be over the points a and b and a pencil z is placed at the extreme outer end of the minor axis, whereupon the cord is drawn tight through one or both of the anchor devices against the pencil so that the parts assume the position substantially as shown in Fig. 2. The pencil is then moved laterally and is guided by the flexible member 1 to make an ellipse of the desired minor and major axis as illustrated in full and dotted lines in Fig. 2. It will be understood that when the cord is drawn tight against the pencil the necessary movement of the cord will be permitted by the anchor devices and that during the movement of the pencil the portion of the cord between the anchor devices is held at the proper length by said devices.

While I have shown and described the anchor devices 2 and 3 as being of the same construction, 1 do not desire to so limit myself, as a clutch may be employed at but one of the devices, if desired. In Fig. 4 I have shown such a construction, in which one of the anchor devices may be constructed as shown in Figs. 1 and 2, while the other anchor device preferably consists of a sleeve 19 through which the member 1 extends, said member being held against movement through said sleeve by a knot or projection 20 of greater diameter than the bore of the sleeve. This sleeve 19 is also provided with the piercing points 21 and 22 for the purpose heretofore described.

My invention has the advantage that it is adapted for drawing different sizes of ellipses from a very small size to those of large sizes, the size being limited solely by the length of the flexible member 1 which is employed. 1

I do not limit myself to the particular form of clutch device shown, as other forms may be employed without departing from the scope of my invention.

What I claim and desire to secure by Letters Patent of the United States is 1. A device of the character described, comprising a flexible member, anchor devices carried by said flexible member, one

of which is provided with a clutch permitting passage of the flexible member in one direction but automatically holding it against movement in the other direction, and means for anchoring said devices.

2. A device of the character described,

comprising a flexible member, anchor devices carried by and supported solely on said member, and movable toward and away from each other lengthwise of said member one of said anchor devices being provided with means to permit free longitudinal movement of said member relative thereto in one direction but automatically operable to hold said member against movement in the opposite direction, and a piercing point carried by each of said devices.

3. A device of the character described, comprising a flexible member, an anchor device carried by and supported solely on the flexible member and having a piercing point, and a second anchor device also carried by and supported solely on said flexible mem her, and having clutch means to connect said record device to said member, said second anchor device having a piercing point,

A. A device of the character described, comprising a flexible member, an anchor device carried by the flexible member and having a plurality of piercing points, and a second anchor device including a clutch member also carried by said flexible member, said second anchor device also having a plurality of piercing points.

5. A device of the character described, comprising a flexible member, an anchor device carried by and supported solely on the flexible member and having a piercing point,

and a second anchor device also carried by and supported solely on said flexible member and provided with clutch means to permit passage of the flexible member relative thereto in one direction but to hold it against movement in the other direction, means for releasing the flexible member from the clutch means, and a piercing point carried by the second anchor device.

6. A device of the character described, comprising a flexible member, an anchor device carried by and supported solely on the flexible member and provided with clutch means to permit movement of said member in one direction but automatically to hold the same against movement in the other direction, a second anchor device also carried by and supported solely on said flexible member and provided with clutch means to permit passage of the flexible member relative thereto in one direction but to hold it against movement in the other direction, and a piercing point carried by each of the said anchor devices.

7. A device of the character described, comprising a flexible member, a tubular anchor device carried by the flexible member, and a second tubular anchor device also carried by said flexible member, said member extending through the bores of said devices, said anchor devices being connected solely by said flexible member, said second anchor device having means adapted to permit free passage of the flexible member therethrough in one direction but automatically to hold it against movement in the opposite direction, and a piercing point carried by each of said anchor devices.

8. A device of the character described, comprising a flexible member, a tubular a11- chor device carried by the flexible member, and a second tubular anchor device having clutch means also carried by said flexible member permitting passage of said member in one direction but automatically holding it against movement in the opposite direction, said member extending through the bores of said devices, said anchor devices being connected solely by said flexible member, and means for anchoring said devices.

In testimony whereof I have hereunto signed my name in the presence of two subscribing Witnesses.

CHARLES I. BERG.

Witnesses:

M. E. MCNINCI-I, C. G. HEYLMUN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington. D. Q.

It is hereby certified that in Letters Patent No. 1,116,549, granted November 10, 1914, upon the application of Charlesl. Berg, of New York, N. Y., for an improvei ment in Ellipsogl'aphs, errors appear in the printed specification requiring correction as follows: Page 2, line 105, for the Word record read second; same page, line 123, after the Word but insert the word automatically; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Oflice.

Signed and sealed this 15th day of December, A. D., 1914.

[SEAL] J. T. NEWTON,

Acting Commissioner of Patents.

Corrections in Letters Patent No. 1,1 16,54 

